Safety



'(No Model.)

W. WINKLESS. SAFETY APPLIANCE FOR ELEVATORS.

Patented Jan. 1'7, 1893.

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UNITED STATES PATENT Erica \VILLIAM WINKLESS, OF NEWPORT, KENTUCKY.

SAFETY APPLIANCE FOR ELEVATORS.

SPECIFIGATION forming part of Letters Patent No. 490,219, dated January17', 1893.

Application filed April 18, 1892. Serial llo. 429,661. (No model.)

T0 aZZ whom it may concern.-

Be it known that 1, WILLIAM WINKLEss, a citizen of the United States,residing at Newport, in the county of Campbell and State of Kentucky,have invented a new and useful Improvement in Safety Appliances forElevators, which improvement is fully set forth in the followingspecification and accompanying drawings, in which- Figure I is a frontelevation of the top of an elevatorcar provided with my improved safetyappliance. Fig. II, a top or plan view of the same. Fig. 1H, a side viewshowing the position of the clamps when out of engagement and FigIV, anenlarged view of the governor partly in section.

My invention relates to improvements in safety appliances for passengeror freight elevators. It is well known that the devices generallyemployed to prevent the disastrous effects of a sudden descent of thecar in case of accident are called into action by the breaking of theropes upon which the car is suspended, but it has become equally wellknown by all who have had experience in the construction and managementof elevators that a large proportion of the many accidents that haveoccurred were due to the derangement of the hydraulic or steam machinerywhich imparted motion to the car and not to the breakage or failure ofthe ropes.

The object of my invention is to provide a simple, practical, andreliable device whereby the downward flight of the car may beautomatically arrested, whenever by any cause, it is released from itssupport.

Referring to the accompanying drawings, 1 designates the vertical guidesor timbers between which the car moves. 2 indicates the top cross-beamof the car secured by angle irons 3 to the side stanchions 4. Ahorizontal shaft 5, journaled as shown, carries on its outer end afriction roller 6, the rim of which is composed of rubber tubing orother elastic material adapted to insure constant frictional contactwith the vertical guide. The opposite end of this shaft imparts motionto the governor by means of bevel gearing. The shaft of the governor iscomposed of an outer sleeve 7 which carries the gear wheel below, andthe collar 8 above. An inner sleeve 9 which is stationary, forms an axlefor the upper collar 10, and an interior spindle 11 which extendsthrough and below the sleeves is journaled in the angle plate 12. Itwill be seen that the spindle remains stationary except when called intoaction for the purpose of checking the fall of the car. The balls 13 areadjustable on the threaded arms 14. The peculiar utility and operationof the governor will be hereinafter described. Plates 16, each having avertical flange, are bolted on top of the cross-beam. An arm 17 ispivoted at its inner end to each of said flanges. Their outer ends arebifurcated and carry dependent fingers 18, which are adapted to engagenotches in the eccentric clamps l9. Chains or cords 20 extend from theunder side of the pivoted arms 17 and pass under idler pulleys 21 to theon ter ends of sliding plates 22, which occupy recesses in the adjoiningplates 16. The inner ends of the slides are provided with idlers 23adapted to engage the grooved eccentric wheels 24: which are pivoted onthe faces of the plates 16. The eccentric wheels are kept in operativeposition by stops S. A chain or cord 25 is attached to the under sidesof the eccentric wheels, passes over the idlers 23 and through the footof the spindle of the governor shaft.

The essential features of the device being specified, their operationwill now be described. The eccentric clamps 19 are held out ofengagement with the vertical guides 1 by the pressure of the dependentfingers 18, as shown in Fig. IlLwhich fingers are locked by theeccentrics 24 in co-operation with the slides 22 and the chains 20 whichare attached to the under sides of the arms 17. The governor beingadjusted as described to the desired limit of speed, the car is free tomove. If, by reason of any derangement of the motor or other cause, thecar should increase its speed beyond the limit fixed by themanufacturers adjustment, the governor will instantly respond throughthe action of wheel 6 and shaft 5 causing the collar 10 to rise andbring the vertical spurs 26 into engagement with the cross pin 27 ofspindle 11. The spindle will then revolve and wind up the chain 25,thereby lifting the eocentrics 24 over the idlers 23 and releasing theslides 22. The arms 17 be ing thus set free, the dependent fingers 18will be thrown upward by the action of the coiled springs 28, Whichsimultaneously bring the eccentric clamps 19 into engagement with thevertical guides 1.

What I claim as new, is:

1. In an automatic safety appliance for elevators, the combination, withspring-actuated eccentric clamps carried by the car and adapted toengage the guide-timbers thereof, of the pivoted arms supported upon thetop crossbeam of the carand carrying fingers or pawls adapted to engagesaid clamps, a governor actuated by the movementof the carand frictionalcontact With the guide-timbers, and means to provide for thedisengagement of said fingers or pawls from said clamps through theaction of said governor, substantially as specified.

2. In an automatic safety appliance for elevators, the combination, Withspring-actuated eccentric clamps carried by the car and adapted toengage the guide-timbers thereof, of the pivoted arms supported upon thetop crossbeam of the car and carrying fingers or pawls adapted to engagesaid clamps, a governor actuated by the movement of the car and frictional contact with the guide-timbers, slides connected to said arms,and means adapted to release said slides through the action of saidgovernor, substantially as set forth.

3. In an automatic safety appliance for elevators, the combination, withspring actuated eccentric clamps carried by the car and adapted toengage the guide-timbers thereof, of the pivoted arms supported upon thetop cross beam of the car and carrying fingers or pawls adapted toengage said clamps, a governor actuated by the movement of the car andfrictional contact with the guide-timbers, slides connected to saidarms, eccentrics supported upon said top cross beam of the car, and achain connected to said eccentrics and passed between them and rolls orsteps upon said slides, and said chain adapted to be drawn upon by saidgovernor, substantially as set forth.

In testimony that I claim the foregoing I have hereunto set my hand,this12th day of April, 1892, in the presence of Witnesses.

IVILLIAM WVINKLESS.

\Vitnesses:

R. S. MILLAR, ROBERT KIRK.

